Pulling-over machine



E. J. RAY.

PULLING-OVER MACHINE. APPLICATION HLED MAYS, 1917.

' Patented Oct.26,1920.

3 SHEETS-SHEET 1.

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E. J. RAY

PULLING-OVER MACHINE.

APPLICATION FILED MAY 3, 1917.

0 92 1. 6 m 24 S an 0% &3 m n w a P E. J. RAY.

PULLlNG-OVER MACHINE.

APPLICATION FILED MAY 3. 1911..

Patented Oct. 26, 1920.

3 SHEETSSHEET 3.

Fig.4.

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UNITED STATES EATENT OFFICE.

EUGENE J. RAY, OF BEVERLY, MASSACHUSETTS, ASSIGNOR, BY MESNE ASSIGNMENTS,

TO "UNITED SHOE MACHINERY CORPORA DION, OF PATERSON, NEVJ JERSEY, A COR- LEC RATION OF NEW JERSEY.

PULLING ovER MACHINE.

Application filed May 3, 1917.

To all whom it may concern:

Be it known that I, EUGENE J. RAY, citizen of the United States, residing at Beverly, in the county oi Essex and State of lt'lassachusetts, have invented certain Improvements in l ulling -Uver Machines, of which the following description, in connection with the accompanying drawings, is a specification, like reference characters on the drawings indicating like parts in the several figures. v

This invention relates to machines for use in the manufacture of boots and shoes for pulling uppers over lasts, and an important object of the invention is to provide in such a machine improved upper pulling means whereby the upper may be stretched readily to the precise degree desired and may be accurately positioned upon the last before it is fastened on the last bottom.

An important feature or the invention consists in the provision in a pulling-over machine of electro-magnetic upper pulling means. Very important advantages in the use of electrical upper pulling means arise from the yielding quality of the pull e1?- iected by such means and the adaptability to precise V and accurate control, whereby the strength of the pull may be readily adjusted in acco dance with the observed con dition of the upper stock and the pulling oi the upper may be terminated without any residual tendency to stretch it further. in the construction shown each of the op posite side grippers of the machine has a solenoid associated therewith for imparting an upper pulling movement to the gripper, together with means for controlling the. flow of the electrical current to permit the strength of the pull on each side of the shoe to be determined at will by the operator and the electrical circuit to be broken at any time as desired. Such a coi'istruction, particularly as adapted for efi'ecting gripper movements in opposite directions at will, as shown, affords also opportunity for precise relative movement of the grippers for adjusting the upper on the last, and a further feature of the invention resides in the provision of electrical means for effecting relative gripper movements for adjusting the upper.

The provision of electrical upper pulling means is 01 particular advantage for sub- Specification of Letters Patent.

Patented Oct. 26, 1920.

Serial No. 166,252.

j ecting the upper to final tension, when too much force or too sudden a pull might cause the upper to tear; and in accordance with a further ieature oi? the invention electrical upper pulling means is combined with means for initially pulling the upper over the last. The upper may thus be subjected to a final gradual yielding pull of such strength as is warranted by the condition of the steel; to cause the upper to be fully stretched in such manner as to insure permanence of shape in the completed shoe without danger of tearing the stock, the electrical means permitting the pulling operation to be terminated instantly when desired, notwithstanding the yielding character oi the pull effected by such means.

Still another feature of the invention resides in novel gripper controlling means,

the illustrative machine having automati cally operative means for locking an upper pulling gripper against movement in a dlrection to relax the tension of the upper and for holding it locked during the overreference 'to the accompanying drawings" and pointed out in the claims.

In the drawings, I

Figure 1 is a view in side elevation of portions of a pulling-over machine in which the invention is embodied,

- Fig. 2 is a view in rear elevation of side gripper operating means showing parts as positioned at the end of the draw movement, portions being shown in section to illustrate the interior construction,

Fig. 3 shows in elevation a portion of the machine as viewed from the opposite side with reference to Fig. 1, this figure illustrating a later stage of the cycle of operations than that illustrated by Fig. '2, and

Fig. i shows more clearly than the other the the figures a detail of the controlling means. I

The invention is illustrated inits application to a machine of a well known type,

Vii

characteristic features of which are shown and described in detail in United States Letters Patent No. 1,029,387, granted on June 11, 1912 upon an application of R. F. McFeely, and only such features of the general organization of the machine as it is necessary to refer to for an understanding of the present invention will be described herein in detail. The machine includes, in addition to the usual toe gripper and its operating means, side grippers 2 for engaging and pulling the forepart of a shoe upper at opposite sides of a last, these grippers being connected to updraw levers 4 which are pivoted at 6 to the frame of the machine and are operated by means of a path cam 8 on a cam shaft 10. The connections between the cam 8 and the updraw levers at comprise a slide 12 having a roll 14 which engages in a groove in the face of the cam, rods 16 projecting upwardly from the slide through blocks 18 in which the rear ends of the levers l are swiveled, and springs 20 on the rods 16, each. bear-- ing at its upper end on a nut on the respective rod and at its lower end on the corresponding block 18. The side grippers 2 are thus subjected to a yielding pull the strength of which depends upon the degree of compression of the springs 20 effected by the downward movement of the slide 12. It will be understood that the operative downward movement of the slide is effected by a partial rotation of the cam 8 upon the actuation of the machine clutch, and that the machine then comes to rest with the upper under tension to permit the operator to inspect the work and to make any adjustment that may be necessary for straightening the tip of. the shoe or for otherwise correcting any inaccuracy in the position of the upper on the last, after which, upon a further actuation of the clutch, the margin of the upper is carried over the last bottom and fastened and the parts are returned to starting position. It is while the upper is under tension at the end of the first stage of the cycle of operations that the means provided by the present invention will be used, in the operation of the illustrative machine, for the purpose of stretching the upper still further on one or both sides, as conditions may require, or it may be for the purpose of adjusting the upper transversely of the last or for relaxing in some degree the tension of the upper.

The machine herein shown is provided with electro-magnetic means for imparting movement in one direction or the other as desired to either of the side grippers, the construction comprising separate connections to each of the side gripper levers and means arranged for separate control to enable the operator to cause one or the other connected to the terminal of the levers to be moved atwill. More specifically, the machine includes solenoids for operating the respective side gripper levers and a rheostat for each solenoid, together with independent connections for controlling the flow of the current.

Mounted on the frame of the machine at the rear and to one side of each updraw lever 4 is a casting 22 shaped to provide a cylindrical casing 24 within which are mounted two solenoid coils 26 and 28, and within each pair of coils is a core 30 which is to be moved upwardly by the action of the upper coil 26 and downwardly by the action of the lower coil 28. Extending downwardly from the core 30 isa rod 32 provided with rack teeth in engagement with teeth on one end of a lever 34- which is pivoted to the casting 22, the other end of the lever engaging rack teeth on a rod or bar 35 which is mounted for vertical movement in bearings in the casting and is pivotally connected at its lower end to a link 86 mounted on a pin 37 extending laterally from the rear end of the corre sponding updraw lever 4. It will be evident that by energizing the upper coil 26 an updraw movement, e'liected by the up ard movement of the core 30, may be imparted to the associated side gripper 2, and that by energizing the lower coil the gripper may be moved in the opposite direction through the downward movement of the core.

For controlling the flow of the electrical current the machine is provided with a rheostat 38 for each pair of coils 26, 28, the two rheostats being mounted respectively at opposite sides of the machine frame within convenient reach of the operator. Each rheostat has terminals 40 and 12 to which the respective line wires and 46 are connected. The terminal 42 is connected to a second terminal 18 from which leads a wire 50 to two terminals 52 and on the rear of the corresponding casing One end of the coil 26 is connected to the terminal 52, and one end of the coil 28 is A direct connection is thus afforded between both the coils and the line wire 46. The other end of the coil 26 is connected to a terminal 56 from which leads a wire 58 to a terminal 60 on the rheostat, this terminal being connected to one of a plurality of contact blocks 62 on one side of the rheostat, these blocks being connected in series by resistance wire 64. The lower end of the coil 28 is connected to a terminal 66 on the casing 2 1 from which leads a wire 68 to a terminal 70 on the rheostat, this terminal being connected to one of a plurality of contact blocks 72 which are connected in series by means of resistance wire 74. The line wire 44: is

connected permanently to terminal contact plates 76 and 78 arranged for cooperation with the respective series of contacts 62 and 7' 2.

F or controlling the flow of the current through the coils 26 and 28 each rheostat includes a hand lever 80 extending ton wardly from a pivot 82, and secuned to this pivot for movement with the lever 80 is an :arm 84 arranged to connect the terminal 76 to one or another of the series of contacts 62 and an arm 86 arranged similarly to connect the terminal 7 8 to one or another of the series of contacts 72. in the neutral position of the hand lever 86, shown in the drawings, the arms 84 and 86 both rest :at their outer ends upon an arc-shaped supporting plate 88. In order to maintain the lever 80 in this neutral position, the frame of the rheostat is provided with a spring the core 36 of the solenoid is connected.

plunger 90, as shown more clearly in Fig. l, the wed e-shaped end or" which engages a notch in a plate 92 last on the pivot 82. This construction affords insurance that the handle '80 shall not he accidentally displaced to cause one or the other of the coils to be energized, while permitting the handle to be readily moved in one direction or the other when the operator so desires. It will be evident that an upward movement of :the iandle from the neutral position shown in the drawings will cause the arm 84- first to connect the terminal plate 7 6 with the lowermost block 62, thereby causing the current to flow through the upper coil 26 of the solenoid and to effect an updraw movement oi the associeted gripper lever i to which if a stronger pull is desired the operator raises the handle still farther, thereby cutting out portions of the resistance 64: successively. ii? the handle 80 is lowered from the position shown in the drawings, the arm 86 will coi'inect the terminal plate 78 to the lowest contact block 72 and with other blocks of the same series in succession, thereby ausing the gripper to be moved in a direction to relax the tension oi the upper a distance increasing in proportion to decrease in the strength of the resistance 74-.

in order to cause the gripper to remain in the position to which it is moved by the action of the solenoid for tensioning the upper, the machine is provided with means for locking each core against downward movement even after the corresponding hand lever 86 has been returned to its neutral position. This means comprises a receptacle Sll mounted on the casting 22,, the receptacle being formed to provide at one side a fluid chamber 96 and at the other side a cylinder 98 in which is mounted a piston 100 secured to the lower end of the rod 32. Communication between the chamber 96 and the cylinder is controlled by means of a valve 102 which is held to its seat at times by :a spring 104:. The topol? the chamber '96 is in communication with the atmosphere through an opening 106, and the upper end of (the cylinder 98 above the {piston 100 is likewise in communication with the atmosphere through a space around the rod 32 as shown. Below the piston the cylinder 98 is preferably filled with a non-compressible fh id such as oil, and the fluid also partially lills the chamber 96 and the passage between the chamber and the cylinder to insure that in any position of the piston the portion of the cylinder below the piston and also the communicating passage shall be filled with oil. It will be evident that with this construction an upward movement of the core 86 in the solenoid, whereby the connected gripper is caused to tension the up- ;per of the shoe, will be accompanied by an upward movement of the piston 100 which will cause oil to be drawn past the valve 162 into the cylinder 98, and that at the end of such upward movement of the piston the valve will be immediately closed by its spring 10d and the piston its connected parts will beheld positively by the fluid against retractionr In order to permit the gripper to be moved in a direct-ion to relax the tension the upper by downward movement of the core 30, the machine is provided with means controlled by movementoit the hand lever 80 for'opening the valve 162 to permit the fluid to flow from the cylinder 98 into the chambar 96. To thisend, the plate, 92 which turns with the lever S6 is shaped on its peto pnwide cam projection I l l is arranged to engage and raise a rod at the be "ning of downward movement oi the l id lever in the direction to cause the cur-rent to flow through the lower coil 28. This rod is arranged to engage at its upper end an arm 112 which is secured to a rock shaft 114, the rock shaft having a second arm 116 connected by a link 118 to a lever 120 pivoted on the receptacle 9%, this lever being arranged to engage the upper end of the stem 122 of the valve 162. fr spring 124; acts at times to uphold the lever 120 and permit the valve to be retained on its seat by the spring 164;. *Whcn the lever 86 is moved downwardly, lcscribed, the upward movement oi the rod lit) causes H e lever 120 to be depressed for opening the valve, and the valve is thereby retained in open position until the lever 80 has been returned to its neutral position. The core 30 is thus rendered tree to move downward to retract the connect-ed gripper.

In order to permit the side grippers to be returned to their starting position after their operation upon a shoe, the machine is provided'also with automatic means for opening the valves 102 durlng the final stage of the cycle of operations. Conveniently this object is effected by utilizing the movement of a cam slide 126 with which machines of the illustrative type are pro vided for the purpose of imparting movement to the tack pot, this slide having an upward movement in the first or upper pulling stage of the cycle and a downward movement in the final stage of the cycle of operations of the machine. Attached to the slide 1.26 is a member 128 which extends rearwardly at opposite sides for engagement with blocks 130 adjustably secured on vertically sliding rods 132, the lower end of each rod 182 bearing upon an arm 13stsecured to the associated rock shaft 114 on the same side of the shaft as the arm 116 previously described. By the downward movement of the slide 126 the lever 120 over each valve stem 122 will thus be depressed through the movement of the rock shafts 114i and the links 118 to open the valves 102 and afford a free passage for the fluid between the chambers 96 and the cylinders 98 during the return of the grippers to starting position. In Fig. 3 of the drawings the parts are shown in the posi tions which they assume While the member 128 is depressing the blocks 130 to cause the opening of the valves.

In the operation of the machine, the shoe is presented to the side and toe grippers in the usual manner and the clutch is actuated to cause the grippers to seize the upper and pull it over the last, the machine then coming to rest with the upper under tension. The position of the parts at the end of the updraw movement is illustrated in Fig. 2. The updraw movement of the grippers is effected, as previously explained, through downward movement of the slide 12 and the consequent compression of the springs 20 upon the rear ends of the levers 4, the slide being separated from the rear ends of the lovers during this movement a distance in proportion to the amount of compression of the springs 20. Such movement of the levers 41 is accompanied by an upward movement of the cores 30 in the solenoids by reason of the connections between the levers and the cores, the pistons 100 also moving upwardly and drawing a portion of the fluid from the chambers 96 past the valves 102 into the cylinders 98. The cores 30 stand initially below a central position with reference to the respective pairs of coils 26 and 28 to cause the cores to assume a substantially central position as illustrated in Fig. 2 in the first updraw movement of the grippers.

While the machine is at rest with the upper under tension theoperator is afforded an opportunity to inspect the work and to determine whether any change in the position of the upper upon the last is required in. order to produce a symmetrical lower coil 28 on that side of the machine to be energized for eiiecting a movement of the corresponding side gripper in a direction to relax the tension of the upper on that side to a greater or less degree, and simultaneously the handle on the other side of the machine may be raised to cause the other side gripper to pull the upper transversely of the last through the action of the other solenoid. By manipulating the levers 80 the operator may thus secure the precise adjustment of the upper transversely of the last which is required. In case it appears to be advantageous to impart additional tension to the upper, one or both levers 80 may be raised to render one or both 01 the coils 26 effective for imparting a further updraw movement to the side grippers. If it is desired to relax the tension of the upper in any degree, one or both of the levers 80 will be lowered, this movement serving also to open the corresponding valve or valves 102 in the manner previously explained. As soon as the upper has been adjusted or tensioned in the man ner required, the lever or levers 80 are returned to neutral position and the side grippers are retained, through the action of the fluid upon the pistons 100, in the positions to which they have been moved.

After the upper has been adjusted and tensioned as required, the machine is started the second time in the usual manner to cause the margin of the upper to be carried over the sole or innersole on the last bottom and fastened in place, after which the parts of the machine return to their starting positions. It will be evident that during such overdraw movement of the grippers to carry the margin of the upper over the sole or innersole the fluid locking devices holdthe grippers against movement toward the plane of the shoe bottom and thus insure that the margin of the upper shall be' drawn tightly into position to be fastened. During the latter part of this stage of the cycle of operations the valves 102 are opened in the manner described to permit the return movement of the grippers effected by the action of the slide 12.

It will be readily understood from a consideration of the well-known characteristic movements of: the tack pot operating slide 126 in machines of the general type illus trated, efiected in the single revolution of the cam shaft 10, that the valves 102, after they have been opened as above described, are held open until the slide 126 is moved upwardly in the first stage of the cycle of operations oh the machine upon. another shoe. action of their closing springs by the automatic' action of their controlling means in quently by the action of the electrical means.

Although the invention is herein shown as embodied in means for operating and controlling the side grippers of apulling-over machine, it will be understood that in many of its aspects the invention is not limited in respect to the location of the gripper or grippers. It will also be evident that the gripper locking means, although shown herein in combination with electrical gripper operating means, presents features of utility not necessarily dependent upon operating means of this particular character, and that in many of its aspects also the in vention is notlimited to locking means of the particular. type illustrated.

Having described the invention, what I claim asnew and desire to secure by Letters Patent of the United States is:

1'. A pulling-over machine having, in combination, a gripper for engaging themargin of an upper on a last, means for operating said gripper to pull the upper, and electro magnetic means for operating the gripper subsequently to increase the tension oi the upper.

2. A pulling-overmachine having, in combination, a gripper forengaging the margin of an upper on a last, a power shatt, connections between said gripper and power shaft for imparting an upper pulling movement to theripper, and eleeto-magnetic means connected to the gripper for operating the gripper independently of said powershaft.

3. A pulling-over machine having, in combination, means for pulling anupper over a last and holding it under tension, and

electro -1nagnetic means arranged to beoperated while the upper is held under tension for increasing the tension of the upper.

4. A pulling-over machine, having in combination, grippers for engagingan at opposite sides of a last, means for operating said grippers to pull the upper transversely over the last, and electro-magnetic means for imparting a further tensioning movement tosaid g ippers.

5. A pulling over machine having, in combination, grippers for engaging an upper at opposite sides of a last, power operated means having a definite range of movenent ifOfOPQlLtlIlg' saidgrippers to pull the The valves are thus released to the upper upper, and electromagnetic meansconnected to the grippers to enable the operator to cause the tension of the upper to be increasedby further movement of the grippers.

63 A pulling over machine having, in combination, a gripper for engaging the margin of upper on a last, means for operating said gripperto pull theupper and then to hold the upper under tension, and electromagnetic means connected tothe gripper for moving the gripper in either direction while the upper is under tension for increasing or decreasing respectively the tensionof the upper.

7 A pulling-over machine having, in combination, a gripper for engaging the margin of an upper on a last, an updraw leverconnected to said gripper, a power shaft, yielding connections between said lever and power shalt forimpartingan upper pulling movement to the gripper, and clectro-magnetic means connected to said lever for effectin a movement o the gripper independently of the power shaft while the upper is undertension.

8. A pulling-over machinehaving, in comper on a last, an updraw lever connected to said gripper, a power shaft, connections between the power shaft and said lever including a spring through which movement is imparted to the gripper, a solenoid, a core in the solenoid connected to said lever, and means for controlling the flow oi? electrical current in the solenoid to cause the gripper to be operated independently of the power shaft.

11.. A pulling-over machine having, in combination, grippers for engaging an upper and pulling it over a last, and electromagnetic means for enabling the operator to effect arel-ative movement of said grippers for adjusting the upper on thelast.

12. A pulling-over machine having, in combination, grippers for engaging an upper at opposite sides of a last, and electromagnetic means connected to said grippers tor enablingthe operator toefiect an adjusting movement of the upper transversely oi the last.

13. A. pulling-over machine having, in combination, grippers for engaging an upper at opposite sides of a last, means for operating said grippers to pull. the upper, supplemental electro-magnetic operating means connected to each side gripper, and mechanism for controlling the operation of said electro-magnetic means to enable the operator to cause an additional movement of one or both of the side ii 3 acre.

14-. A pulling-over machine having, in combination, grippers for engaging an upper at opposite sides of a last, means for op erating said grippersto cause them to pull the upper and then to hold the upper under tension, and electromagnetic means constructed and arranged for separate control in respect to each side gripper for effecting at the will of the operator a subsequent movement of one or both of said grippers either in a direction to increase the tension of the upper or in a direction to decrease said tension.

15. A pulling-over machine having, in combination, a gripper for engaging an upper on a last, and means for effecting relative movement of said gripper and the last to pull the upper and for then stopping the upper pulling operation without any residual tendency in said means to continue such relative movement, said means comprising electro-magnetic mechanism and a device for making and breaking the electrical circuit in said mechanism.

16. A. pulling-over machine having, in combination, a gripper for engaging an upper on a last, and means for operating said gripper to pull the upperand for then stopping the upper pulling operation without any residual tendency in the operating means to continue the movement of the gripper, said operating means comprising a solenoid connected to the gripper, and means for making and breaking the electrical circuit in said solenoid.

1. A pulling-over machine having, in combination, a gripper for engaging an upper on a last, electro-magnetic mean for operating said gripper, and controlling means to enable the operator to break the electrical circuit at any time during the upper pulling operation to terminate the application of force to the gripper.

18. A pulling-over machine having, in combination, a gripper for engaging an upper on a last, a solenoid, connections between the solenoid and said gripper, and means for controlling the flow of electrical current through said. solenoid to cause the gripper to be moved in diilerent directions at the will of the operator.

19. A pulling-over machine having, in combination, grippers for engaging an upper on a last, a solenoid associated with each gripper, a core in each solenoid connected to the respective gripper for imparting an up per pulling movement to the gripper, and a separately controlled rheostat for each solenoid for controlling the flow oi? current through the solenoid to vary the degree of tension of the upper.

20. A pulling-over machine having, in combination, a gripper for engaging an upper on a last, a solenoid comprising separate coils, a core arranged to be moved in opposite directions by the action of the respective coils, a connection between said core and the gripper for imparting movement to the gripper, and means for controlling the flow of electrical current through said coils.

21. A pulling-over machine having, in

combination, a ripper for engaging an upper on a last, means for operating said gripper to pull the upper and then to hold the upper under tension, a solenoid comprising separate coils, a core arranged to be moved in opposite directions by the respective coils, a connection between said core and the gripper for imparting movement to the gripper, and means for controlling the flow of electrical current through said coils to cause the gripper either to increase or to relax the tension of the upper.

22. A pulling-over machine having, in combination, an upper engaging gripper, means for operating said gripper to pull an upper over a last, a solenoid comprising two coils arranged end to end, a core within said coils, means connecting said core to the gripper arranged to cause the core to be moved to a substantially intermediate position with reference to said coils by said pulling movement of the gripper, and means for directing electrical current through one or the other of said coils for effecting a supplemental movement of the gripper to increase or relax the tension of the upper.

23. A pulling-over machine having, in combination, an upper engaging gripper, operating means for imparting movement to said gripper to pull an upper over a last, and fluid means for locking said gripper against movement in a direction to relax the tension of the upper.

24. A pulling-over machine having, in combination, an upper engaging gripper,

means for imparting movement to saidgripper to pull an upper over a last, a cylinder, a piston in said cylinder, the cylinder having a fluid passage communicating there with, means connected to said gripper for effecting a relative movement of the cylinder and piston during the updraw movement of the gripper, and a valve for said passage arranged to open to permit said relative movement of the cylinder and piston and to close to lock the gripper against return movement.

25. A pulling-over machine having, in combination, an upper engaging gripper,

means for imparting movement to said gripper to pull an upper over a last, a receptacle for liquid, a cylinder, means providing a passage between said receptacle and cylinder, a piston in the cylinder, means connecting the piston to said gripper for moving the piston during the updraw move ment oi the gripper, and a check valve for said passage arranged to permit a flow of liquid in the passage during said movement of the gripper and to prevent a return flow.

26. A pulling-over machine having, in combination, an upper engaging gripper, means for imparting movement to said gripper to pull an upper over a last, a cylinder, a piston in said cylinder, means connected to said gripper for effecting a rela- Jaive movement of the cylinder and piston for drawing fluid into the cylinder during the updraw movement of the gripper, and a valve for preventing return of the fluid from the cylinder.

2?. A pulling-over machine having, in combination, an upper engaging gripper, means "for imparting movement to said gripper to pull an upper over a last, a receptacle TlfOl liquid, a cylinder, means of communication between said receptacle and cylinder, a piston in the cylinder, means connecting the piston to the gripper to cause the piston to draw liquid into the cylinder during the updraw movement of the gripper, and means for locking the gripper against retra =tion from its upper tensionin position by p' eventing return of the fluid.

28 ulling-over machine having, in combination, an upper engaging gripper, means for imparting upper pulling movement said gripper, fluid means for autonatically locking the gripper against movement in a direction to relax the tension of the upper, and means for unlocking. the gripper. V f

29. A pulling-over machine having, in combination, an. upper engaging gripper, means for imparting movement to said gripper to pull an upper over a last, a cylinder having a fluid passage communicating therewith, a piston in the cylinder, means connected to said gripper for effecting a relative movement the cylinder and piston to cause a iiow of fluid in said passage durin the updraw movement oil the gripper, a valve for n'eventing return of the fluid to cause the gripper to be locked against retraction from its upper tensioning position, and means enabling the operator to open said valve.

30. A pulling-over machine having, in combination, an upper engaging gripper, means ior imparting movement to said gripper to pull an upper over a last, cylinder having fluid passage communicating therewith, apiston in the cylii'ider, means connected to said gripper forv effecting a relative movement of the cylinder and piston to cause a flow or" fluid in said passage during the updraw movement of the gripper, a valve for preventing return of the fluid to cause the gripper to be locked against retraction from its upper tensioning position, and automatic means for opening said valve to permit the gripper to be returned to start ing position. v

31. A pulling-over machine having, in combination, an upper engaging gripper, electro-magnetic means for operating said gripper to pull an upper over a last, and means for locking the gripper against retraction from its upper tensioning position.

A pulling-over machine having, in combination, an upper engaging gripper, electro-magnetic means for moving said gripper either in a direction to pull an upper over a last or in direction to (relax the tension of the upper, a rheostat for con trolling the operation of said means, m 2115 i for locking the gripper against retraction from its upper tensioning position, and means controlled by saidrheostat for unlocking the gripper topermit its movement in the direction to relax the tension.

A pulling-over machine having, in combination, an upper engaging gripper, electro-magnetic means for operating said gripper, a member for controlling the flow of electrical current in said means, means for locking the gripper against movement in one direction, and means operated by said controlling member for unlocking the ripper.

A pulling-over machine having, in combination, an upper engaging gripper, electro-magnetic means for operating said gripper, a member for controlling the flow of electrical current in said means, fluid means including a valve for locking the gripper against movement in one direction, and means operated by said controlling member for opening said valve,

35. A pulling-over machine having, in combination, an upper engaging electro-magnetic means for moving said gripper either in a direction to pull upper over a last or in a direction to relax: the tension of the upper, mechanism tor com trolling the flow of electrical current in said means, fluid means including a valve for locking the gripper against retraction from upper tensioning position, and means operated by said controlling mechanism for opening said valve when the gripper is to be moved in the direction to relax the tension.

A pulling-over machine havin in combination, an upper engaging gripper, a solenoid, a core in said-solenoid connec ed to the gripper for imparting upper in'g movement to the gripper, an, means connected to said core for locking the gripper against retraction from upper tensiomng position.

upper tensioning pc-sltion, and mechafrom nism operated by said controlling means for opening said valve.

38. ii. pullingover machine having, in combination, an upper enga ing gripper, means for operating said gripper to pull an upper over a last, supplemental means for operating said gripper to increase the tension of the upper, and fluid means for locking the gnipper a ainst retraction from its position of increased tension.

39. A pulling-over machine having, in combination, an upper engaging gripper, means for operating said gripper to pull an upper over a last, supplemental means for operating said gripper to increase the tension oi the upper, fluid means including a valve for loclring the gripper against retraction from its position of increased tension, and means for openingsaid valve to permit the gripper to return to starting position.

d0. A mlling-over machine having, in combination, an upper engaging gripper, means for operating said gripper to pull an upper over a last, electromagnetic means for imparting a supplemental pullingmove ment to said gripper for furthe" tension ng the upper, and means for loclring the gripper against retraction from its position of increased tension.

il. A pulling-over machine having, in combination, a gripper for en 'aging an upper on a last, power-driven means having a prescribed range of action for effecting relative movement of the gripper and the last to pull the upper, and electro-magnetic means connected to said gripper and arranged for use under manual control subsequent to said upper pulling operation for imparting movement to the gripper in a direction to change the tension under which the upper is held by the gripper.

42. A pulling-over machine having, in combination, a gripper for engaging an upper on a last, means for effecting relative movement oi said ripper'and the last to pull the upper and for then holding the upper under tension, and electro-magnetic means for eiiec ing relative movement of the last and said gripper While the upper is thus held under tension to change the tension under which the upper is held.

43. A pulling-over machine having, in combination, grippers for engaging an upper on a last, means for eii'ecting relative grippers in different directions at the Will of the operator to change the tension under which the upper is held or to adjust the up per on the last.

. il. A pulling-over machine having, in combination, grippers for engaging an upper on a last, and independently controlled elective-magnetic operating mechanisms connected respectively to different grippers for imparting movement to one or more of said grippers at the will 01 the operator.

do. A pulling-over machine having, in combination, a gripper for engaging an upper on a last, electromagnetic operating means, and controlling mechanism for causing said operating means to efi'ect relative movement of the gripper and the last either to pull the upper or to relax the tension of the upper.

46. A pulling-over machine having, in combination, a gripper for engaging an upper on a last, electro-magnetic gripper operating means, and controlling means for rendering said operating means efiective to move the gripper either in a direction to pull the upper or in a direction to relax the tension of the upper.

a7. A pulling-over machine having, in combination, grippers for engaging an upper at opposite sides of a last, means for eii ecting relative movement of said grippers and the last: to pull the upper, independently controlled electro-magnetic operating mechanisms connected respectively to said opposite side grippers for moving either gripper at the Will of the operator in a direction to increase the tension of the upper, and a fiuid lock for holding either gripper against movement toward the plane of the shoe bottom While the other gripper is operated by its electro-magnetic mechamsm.

A pulling-over machine having, in

combination, a gripper for engaging an upper on a last, means for operating said gripper to pull the upper, a fluid lock including a fluid retaining valve for holding said gripper against retractive movement, means for opening said valve at a definite time in the cycle of operations of the machine to unlock the gripper, and additional manually operative means for enabling the operator to open said valve at Will.

1-9. A pulling-over machine having, in combination, a gripper for engaging an upper on a last, means for effecting relative movement of the last and said gripper to pull the upper, means for operating the gripper to draw the margin of the upper combination, a gripper for engaging an upper on a last, means for operating said gripper to pull the upper, additional means for moving the gripper yieldingly to increase the tension of the upper, and means for locking the gripper against retraction from its position of increased tension.

51. A pulling-over machine having, in combination, an upper engaging gripper, means having a prescribed range of movement for operating said gripper to pull the upper, additional means for imparting at the will ofthe operator a supplemental pulling movement of variable extent to said gripper, and means automatically operative to lock the gripper against retractive movement from any position to which it is moved by either of said different means.

52. A pulling-over machine having, in combination, an upper engaging gripper, a solenoid, means for operating said gripper to pull the upper yieldingly, electro-magnetic means comprising a solenoid for operating said gripper to impart a supplemental yielding pull to the upper, and means for locking the gripper against retractive movement when the current in said solenoid is broken.

53, A pulling-over machine having, in combination, upper gripping means, electromagnetic means for operating said gripping means to pull the upper, controlling means to enable the operator to break the electrical circuit at will and thus to relieve the gripping means from the force of said operating means, and means automatically operative to hold the gripping means against retractive movement in response to the pull of? the upper when the circuit is thus broken.

, 54. A pulling-over machine having, in combination, a plurality of grippersfor en- I gaging an upper on alast, electro-magnetic pp ep ra eme comp n a PM rality o if' solenoidsconnected respectively to the different gr ppers, and means for controllingthe flow of electrical current in the,

different solenoids to causeone or more of the grippers: selectively to pull the the will of the operator.

. A pul n e m l i ri Q n; combination, an upper engaging gr1pper,. means for impart ngoperative movement to said gripper, a member connected to said gripper to be moved idly during sa d oper-v ti e movement of the glfiPP a 6 magnetic means for imparting a subsequent movement to the gripper through said member.

56. A pulling-over machine having, in

combination, an upper engaging gripper,

means for imparting operative movement to said gripper, a member connected to said gripper to be moved idly during said operative movement of the gripper, a solenoid in operative relation to said member, and

means for causing said solenoid to be energized to impart a supplemental movement to the gripper.

57 A pulling-over machine having, in combination, an upper engaging gripper, a gripper operating lever unyieldingly connected to said gripper, a solenoid connected to said lever for operatin the lever, and means for controlling the how of electrical current in said solenoid to initiate or to sto the pulling of the upper.

58. A pulling'over machine having, in combination, an upper engaging gripper, a' gripper operating lever, a solenoid connected to said lever, means for controlling the flow ofelectrical current in said solenoid, and means also connected to said lever for locking the gripper against'retractive movement when the electrical circuit is broken.

59. A pulling-over machine having, in combination, an upper engaging gripper, a lengthwise movable bar arranged to be operated by said solenoid andconnected to the 'Q,11P1)G1',-J.Ild means connected to said bar.

for locking the gripper against 'retractive movement. 7

60. A' pulling-over machine having, in combination, an upper engaging gripper, a lengthwise'movable bar, a solenoid at one end of the bar for operating it, automatically operative locking means at the other end of the bar, and connections between said bar and the gripper for imparting movement to the gri vper.

61. In a mac iine of the class described, the combination with an upper engaging gripper, of means for im arting an upper pulling movement to sai gripper, means for locking the gripper against retractive movement, and meansarranged to receive 7 operative movement in said upper pulling 62Qln a machine of the class described,

the combination with an upper engagingv gripper, of, means for imparting an upper for moving thegripper subsequently in a ,7 pulling iinovement to said gripper, means upp r Jdirection toincrease, the tension of theupj ,per, means forlocking the gripper against retractivemovement,and means operative in said first movement of the gripper for rendering said locking means efiective to dth g pp r-i. c

63. In. a, machine of the class described, the combination with an upper engaging gripper, of means forimparting an upper pulling movement to said gripper, means for subsequently imparting an additional movement to the gripper, means for locking the gripper against retraction from the position attained in said additional movement, and. means automatically operative 5 during the cycle of operations of the machine for rendering said locking means alternately effective and ineffective to hold the gripper.

64-. In a machine of the class described, the combination with an upper engaging gripper, of means for operating said gripper, a bar movable with the gripper, means cooperating with said bar to lock the gripper against retractive movement, and means for controlling said locking means to render it either effective or inefiective to hold the gripper.

65. In amachine of the class described, the combination with an upper engaging gripper, of mechanism for operating said gripper first to pull the upper and then to overdraw the upper, power operated means under control of the operator for imparting a supplemental movement to the gripper 5. after its pulling movement and prior to the overclraw, and means for looking the gripper against retractive movement from the position assumed in said supplemental movement and for holding it looked throughout the overdrawing operation. I

66. In a machine of the class described, the combination with an. upper engaging gripper, of power operating means, connections to the gripper through which it may be moved by said operating means either to pull the upper or to relax the tension, controlling means normally positioned to render the operating means inoperative to move the gripper and movable in opposite directions to cause the gripper to be moved in the different directions alternatively, means operative in said normal position of the controlling means for locking the gripper against movement in one direction, and means arranged to be operated by the controlling means to cause said locking means to release the gripper when the gripper is to be moved in said direction.

67. In a machine of the class described,

the combination with means for gripping an upper on a last, of mechanism for effecting relative movement of said gripping means and the last to pull the upper yieldingly, means for operating the gripping means subsequently to overdraw the upper, and means for subjecting said gripping means to positive control in respect to its relation to the plane of the shoe bottom throughout its overdrawing movement.

68. In ainachine of the class described, the combination with an upper engaging gripper, of means for operating said gripper to pull the upper comprising an operating member and connections constructed and arranged to permit relative yielding movement betweenthe gripper and said member, means for moving the gripper to draw the margin of the upper inward over the bottom of the last, and means for preventing such relativevyielding movement in the gripper operating connections throughout the overdraW- ing movement of the gripper.

69. In a machine of the class described, the combination with means for gripping an upper on a last, of mechanism for effecting relative movement of said gripping means and the last to pull the upper yieldingly, means for operating the gripping means subsequently to overdraw the upper and means for locking the gripping means and holding it against yield in a direction toward the plane of the shoe bottom throughout the overdrawing operation.

70. In a machine of the class described, the combination with an upper engaging gripper, of means for imparting an upper pulling movement to said gripper, means for locking the gripper against retractive movement from the position attained in said upper pulling movement, and means automatically operative during the cycle of operations of the machine for rendering said locking means alternately effective and ineffective to hold the gripper.

71. In a machine of the class described, the combination with upper gripping means,

of mechanism for operating said gripping means first to pull the upper and then to overdraw the upper, means for locking said gripping means against yielding movement in a direction toward the plane of the shoe bottom during the overdrawing operation, and mechanism for rendering said locking means effective to hold the gripping means and for operating it to unlock the gripping means only after the overdrawing operation has been completed.

72. In a machine of the class described having a cycle of operations wherein the upper is pulled and then held under tension with the machine at rest and'is overdrawn when the machine is again started, the combination with upper gripping means and mechanism for operating it to pulland to overdraw the upper, of means for locking said gripping means against yielding move- 1 EUGENE J. RAY.

Itis hereby certified that in Letters Patent No. 1,356,887, granted October 26,

1920, upon the application of Eugene J. Ray, of Beverly, Massachusetts, for an improvement in Pulling-Over Machines, errors appear in the printed specification requiring correction as follows: Page 9, lines 2627, claim 52, strike out the Words and comma a solenoid,; same page, line 92, claim 59, after the Word gripper insert the Words and comma a solenoid and that the said Letters Patent should be read with these corrections therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 1st day of March, A. D., 1921.

L. B. MANN,

Acting Commissioner of Patents.

[SEAL] 

